Push-piece device on watch-crowns.



' 0. DUOHESNE. PUSH PIECE DEVICE 0N WATCH GROWNS.

APPLICATION FILED JULY 18, 190B.

, 91 5,57 1 Patented Mar. 16, 1909.

all y E CLAUDIUS DUOHESNE, OF GENEVA, SWITZERLAND.

PUSH-PIECE DEVICE .ON WATGH-CROWNS.

. Specification of Letters Patent.

Patented March 16, 1909.

Application filed July 18, 1908. Serial No. 444,279.

. To all whom it may concern:

I Be it known that I, CLAUniUs DUoi-IEsNE,

.a citizen of, Switzerland, residing at 4 Rue ,Grenes, Geneva, in thecanton of Geneva, Switzerland, have invented an Improvement in andRelating to Push-Piece Devices for VVatchlrowns, of which the followingis a i Heretofore so far as I am aware the push specification.

piece devices for watch crowns have included a push piece button whichacts upon pins or screws passed into holes provided therefor either in asquare piece of material secured in a watch crown or in a barrel in thewatch crown, and experience has shown that in placing the stem inposition, these pins are often injured or entirely broken off, and theobject of my invention is to overcome the hereinbefore named difliculty.

In carrying out my invention. I employ a button constituting part of apush piece, the button being provided with two branch members suitablyconnected therewith and adapted to slide within the pendant to 0peratethe lid latch or other part, the whole structure being contained withinthe crown and pendant and adapted to connect these arts, as will behereinafter more particularly escribed.

In the drawing, Figure 1 is a vertical section illustrating my presentinvention. Fig. 2 is a view similar to Fig. 1 taken in a plane at rightangles thereto. Fig. 3 is a section on the line A B Fig. 1. Figs. 4 and5 are detailed sectional views of modifications of arts of the structureshown in Figs. 1, 2 an 3 taken through the stem and projections of thepush piece. Fig. 6 is a vertical section showing a further modificationof the invention. Fig. 7 is a cross section on line C D Fig. 6, Fig. 8is a vertical section show ing a still further modified form of theinvention, and Fig. 9 is a section on line E F Fig. 6.

Referring to the drawing, a designates a button which is part of thepush piece employed to operate the lid latch or other device of a watch.This button a is provided with two arms or branches 6 oppositelydisposed, spaced apart and as shown in Fig. 1, are preferably integralwith the button a. The arms 5 at their free ends are preferablyin-turned so as to closely surround the win ing stem (Z by a cup-sha edformation indicated at 0 through whic as will be understood, the stem atis freely revoluble and upon which the said in-turned extremities of thearms I) may slide.

6 designates a head providedwith a central a erture adapted to receivethe extrem- Fig. 3 is flat sided so as to be made, to turn with the head0. The upper end of thehead i e is screw threadedand by means of whichit and in the opposite sides of the head. 6 there are flattened portionsa running longitudinally thereof and in which the arms I) of the buttona are adapted to fit and slide; it being. understood as hereinbeforeintimated, that the cup-shaped lower extremities of the arms 6 upon thebutton a being pressedwill act upon suitable devices to move the lidlatch h or other parts of thewatch which are intended to be actuated bythe button a, through a tube t surrounding the stem (1 and as shown inFigs. 4 and 5, it will be understood that it is within the nature andspirit of my invention to provide the head c with concave surfaces andthe arms I) with convex surfaces, or to provide the head c with convexsurfaces and the arms I) with concave surfaces instead of both membersbeing provided with flat surfaces as indicated in Fig. 3.

Referring to the modification shown in Figs. 6 and 7 the arms orbranches as will be understood, may form the parts of a tube 9 whichextends throughout the entire length of the pendant and is connected tothe button a by having the upper end portions thereof interiorly screwthreaded to screw into a recess provided therefor in the button a; theupper end of the tube as will be understood, is out awav on oppositesides to provide the oppositely disposed arms I; which pass throughrecesses provided therefor in the crown f and into the annular recess inthe button (1. Within the tube 9 the winding stem (1 is provided with ahead 6 as in the other form of the invention, and the upper end of thispart is of reduced diameter and screw-threaded to be connected with abarrel f 1 integrally with or connected to the stem f; the barrel ffitting within the tube g and the aforesaid recesses for the arms andbranches being provided between the barrel f and the outer portion ofthe crown f.

In the modification shown in Fig. 8, the oppositely disposed arms orbranches 6 are integral with the push button a and the ity of thewinding stem d which as shown in.

l is adapted to be connectedtothe crown f lower ends thereof arescrew-threaded and adapted to be connected thereby to the upperextremity of the tube 9 similar in all respects to that shown in Figs. 6and 7, the said arms or branches 1) in this construction passing throughsimilar recesses in the crown f like those described for the dividedportions of the tube 9 shown in Figs. 6 and 7.

I claim as my invention:

1. In a watch, the combination with a pendant and winding stem, of ahead on said stem, a crown, a push piece, a tube surrounding said headand slidable thereon, and arms associated with said tube and extendingthrough apertures provided therefor between the said head and crown andconnected to the said push piece.

2. In a watch, the combination with a pendant and winding stem, of ahead fixed on said stem, a crown having a recess therein, a push piecewithin the recess in the crown, a tube surrounding the said head andcurved arms integral with the said tube and extending through theapertures provided therefor in the said crown and connected to the saidpush piece.

3. In a watch, the combination with a pendant and the winding stem, of ahead fixed on thes aid stem, a crown having a recess therein, apush-piece within the recess in the crown, a tube surrounding the saidstem and head thereon, curved arms integral with the said tube andextending through apertures provided therefor in the said crown andconnected to the said push-piece.

4. In a watch, the combination with a pendant and the winding stem, of ahead iixed on the said stem, a crown having a recess therein, acentrally disposed barrel integral with the said crown and in which thesaid crown is connected to the said head, a push-piece having an annularscrewthreaded recess therein, a tube surrounding said stem and head andslidable thereon, and curved screw-threaded arms integral with the saidtube and extending through apertures provided therefor in the said crownand adapted. to be received in the said annular recess in the saidpush-piece.

In testimony whereof I have affixed my signature in presence of twowitnesses.

CIJAUDIU S DUCHESNE.

Witnesses L. H. M NIOER, It. DE HURsTEMBERGER.

